Silvio in a case
After buying my Silvio frameset in the US, I took it back to Europe in a 31" suitcase from Walmart. It was a tight fit for the main frame. You could not fit a frame with attached front fork. Or rear fork for that matter. In principle you would need to remove the whole front triangle separating the fork from the boom. The boom and the chain stay could remain assembled but folded flat. Remove rear fork and carbo-yoke as one unit. Remove seat. Final problem, wheels. They won't fit into the case but would have to travel separately.
Mike